Hamburg 2001 – scientific programme
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O: Oberflächenphysik
O 9: Organische Dünnschichten und Festkörper
O 9.1: Talk
Monday, March 26, 2001, 16:15–16:30, B
Towards controlled metal contacts on organic thin films — •A. Dürr1, B. Krause1, K. Ritley1, V. Kruppa1, F. Schreiber1,2, and H. Dosch1,2 — 1Max-Planck-Institut für Metallforschung, Heisenbergstr. 1, D-70569 Stuttgart — 2Institut für Theoretische und Angewandte Physik, Universität Stuttgart, D-70550 Stuttgart
For many of the present and future electronic applications of organic materials, the organic-inorganic interface plays an important role, e.g., in the form of a metallic contact for charge injection. Whereas there is a certain amount of work on the growth of organics on metals, the growth of metals on organic surfaces is only poorly understood.
We present a study of Au films evaporated on crystalline organic thin films of diindenoperylene (DIP), employing x-ray scattering in various geometries (specular and diffuse reflectivity, high-angle (Bragg) scattering, grazing-incidence diffraction (GID)), non-contact atomic force microscopy (NC-AFM), and transmission electron microscopy (TEM). DIP was chosen, since we have previously found that it can be grown with very high structural quality.
We show how the structure and particularly the interdiffusion at the organic/metal interface can be controlled by suitable preparation conditions.
Finally, we discuss post-growth interdiffusion effects as observed in annealing studies, which should simulate operation of devices at elevated temperatures.